You'll need to say more. See Reporting Problems for the two things we always need in order to help. (You provided a Debug ID from the Zotero Connector, which has nothing to do with citing in Word.)

If you're getting an error trying to cite in a specific document but it's working in a new, empty document, follow the dialog to the Troubleshooting Errors in Word Processor Documents page and follow those steps to the end.